Applying the Angle Addition Postulate

1. Define the angle addition postulate in your own words.

2. If the measure of angle A is 25 degrees and the measure of angle B is 15 degrees, what is the measure of the larger angle formed by angle A and angle B?

3. Given that the measure of angle X is 40 degrees and the measure of angle Y is 60 degrees, use the angle addition postulate to find the measure of the angle formed by angle X and angle Y.